> On Feb. 28, 2017, 6:32 p.m., Alejandro Fernandez wrote: > > ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/metainfo.xml, > > line 64 > > <https://reviews.apache.org/r/57147/diff/1/?file=1651734#file1651734line64> > > > > What happens if a rebalance command is issued and one is already > > running? > > > > I don't want a process running on Ambari for up to 2 hours. And for > > very large clusters (1000+ nodes), it may still timeout.
HDFS stores a file in /system/balancer.id while the balancer is on-going. As soon as it finishes, it is deleted. You can use that to make the call return right away and run in the background, and also prevent subsequent calls from launching another rebalancer. - Alejandro ----------------------------------------------------------- This is an automatically generated e-mail. To reply, visit: https://reviews.apache.org/r/57147/#review167117 ----------------------------------------------------------- On Feb. 28, 2017, 6:01 p.m., Laszlo Puskas wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://reviews.apache.org/r/57147/ > ----------------------------------------------------------- > > (Updated Feb. 28, 2017, 6:01 p.m.) > > > Review request for Ambari, Alejandro Fernandez, Robert Levas, Sandor Magyari, > and Sebastian Toader. > > > Bugs: AMBARI-20175 > https://issues.apache.org/jira/browse/AMBARI-20175 > > > Repository: ambari > > > Description > ------- > > HDFS rebalance operation can last for a long time (hours/days) thus when > triggered from the UI the command may be timed out by the Ambari server. > This behavior may confuse users, making them to trigger the rebalancer again > which will fail with "another balancer is running" error. > > The patch provides support for setting a reasonably long timeout for the > rebalance custo action so that Ambari server doesnt time out the command. > > > Diffs > ----- > > > ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelper.java > 867ebff > > ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/metainfo.xml > fd7f2f6 > > Diff: https://reviews.apache.org/r/57147/diff/ > > > Testing > ------- > > Unit tests OK. > Manually tested on local dev-env. > > > Thanks, > > Laszlo Puskas > >
